MAX3040EUE+T

Overview

The MAX3040EUE+T is a quad RS-485/RS-422 transmitter operating from a single +5V supply. It supports data rates up to 250kbps with slew-rate limiting to minimize EMI. The device features ±10kV Human Body Model ESD protection and ±4kV Electrical Fast Transient immunity per IEC 1000-4-4. It includes hot-swap capability for safe insertion into live backplanes. Operating current is typically 1mA, dropping to 2nA in shutdown mode. It is housed in a 16-pin TSSOP package and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated hot-swap inputs prevent false transitions during power-up or board insertion.
• Slew-rate limited outputs reduce signal reflections on improperly terminated cables.
• Robust transient immunity protects against electrical fast transients and surge events.
• Low-power shutdown mode significantly reduces standby current consumption.

Applications

• Telecommunications equipment
• Industrial motor control systems
• Hand-held measurement devices
• Industrial programmable logic controllers (PLCs)
• Networking infrastructure

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing components. Confirm the 'E' designation ensures the extended industrial temperature range is met for your application environment. Cross-reference the datasheet revision to ensure compatibility with existing design files.

Selection Notes

Select this component for applications requiring robust ESD protection and hot-swap functionality on RS-485 or RS-422 buses. Ensure the system operates at 5V and requires data rates compatible with the 250kbps limit. Verify that the 16-pin TSSOP footprint fits the available PCB space constraints.

Part Context

This part belongs to the MAX3040–MAX3045 family of quad transmitters. It serves as a pin-compatible upgrade to industry-standard drivers like the SN75174. The family offers various speed options, with the MAX3040 specifically optimized for lower-speed, noise-sensitive transmissions.

Replacement Considerations

Direct pin-compatible replacements include the MAX3041 for higher speeds or the MAX3042B for maximum throughput. Legacy equivalents such as the SN75174 may require circuit adjustments due to lower protection levels.